class Student:
    name = None #记录姓名
    gender = None #记录性别
    nationality = None #记录国籍
    age = None #记录年龄

stu_1 = Student()
stu_2 = Student()

stu_1.name = "ddd"
stu_1.gender ="女"
stu_1.nationality = "中国"
stu_1.age = 21
print(stu_1.name)
print(stu_1.gender)
print(stu_1.nationality)
print(stu_1.age)
